If a hydrologic model's output shows high sensitivity to its initial soil moisture content, what specific field data collection effort should be prioritized to reduce output uncertainty?

If a hydrologic model's output shows high sensitivity to its initial soil moisture content, meaning that small changes in the starting amount of water in the soil lead to large differences in the model's predictions, and consequently results in high output uncertainty (a wide range of possible predictions), the specific field data collection effort that should be prioritized is the direct, accurate, and spatially representative measurement of initial soil moisture content across the model's domain. A hydrologic model is a computer program that simulates the movement and storage of water in a watershed or landscape, predicting quantities like streamflow or runoff. The initial soil moisture content is the amount of water held within the soil profile at the exact moment the model simulation begins. High sensitivity implies that this parameter criti....